An IoT-Based Data-Driven Real-Time Monitoring System for Control of Heavy Metals to Ensure Optimal Lettuce Growth in Hydroponic Set-Ups. - Sambandh Bhusan Dhal; Shikhadri Mahanta; Jonathan Gumero; Nick O'Sullivan; Morayo Soetan; Julia Louis; Krishna Chaitanya Gadepally; Snehadri Mahanta; John Lusher; Stavros Kalafatis (Sensors, 2023)